No, this is not an issue for this particular event. The last time we came close was 2012, but even then the ice was only 10 or 12cm thick on large parts of the route. This is most emphatically the result of a changing climate. On eleven of the fifteen occurrences of this event the ice measured 25cm of thickness.
Do you have any source for the historic values of ice thickness? Not questioning it, but I've tried to look around for such a statistic before writing the first comment, but I wasn't able to find anything.
